mirror of
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559 lines
18 KiB
Go
559 lines
18 KiB
Go
// Copyright 2019 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty off
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package trie
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import (
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"bytes"
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"fmt"
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"os"
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"github.com/ledgerwatch/turbo-geth/common"
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"github.com/ledgerwatch/turbo-geth/core/types/accounts"
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)
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// StreamItem is an enum type for values that help distinguish different
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// types of key-value pairs in the stream of values produce by function `ToStream`
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type StreamItem uint8
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const (
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// AccountStreamItem used for marking a key-value pair in the stream as belonging to an account
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AccountStreamItem StreamItem = iota
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// StorageStreamItem used for marking a key-value pair in the stream as belonging to a storage item leaf
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StorageStreamItem
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// AHashStreamItem used for marking a key-value pair in the stream as belonging to an intermediate hash
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// within the accounts (main state trie)
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AHashStreamItem
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// SHashStreamItem used for marking a key-value pair in the stream as belonging to an intermediate hash
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// within the storage items (storage tries)
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SHashStreamItem
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)
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// Stream represents the collection of key-value pairs, sorted by keys, where values may belong
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// to three different types - accounts, strage item leaves, and intermediate hashes
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type Stream struct {
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hexes [][]byte
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itemTypes []StreamItem
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aValues []*accounts.Account
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sValues [][]byte
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hashes []common.Hash
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}
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// ToStream generates the stream of key hexes, and corresponding values, with branch nodes
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// folded into hashes according to givin ResolveSet `rs`
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func ToStream(t *Trie, rs *ResolveSet, trace bool) *Stream {
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hr := newHasher(false)
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defer returnHasherToPool(hr)
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var st Stream
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toStream(t.root, []byte{}, true, rs, hr, true, &st, trace)
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return &st
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}
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func toStream(nd node, hex []byte, accounts bool, rs *ResolveSet, hr *hasher, force bool, s *Stream, trace bool) {
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switch n := nd.(type) {
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case nil:
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case valueNode:
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if trace {
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fmt.Printf("valueNode %x\n", hex)
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}
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s.hexes = append(s.hexes, hex)
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s.sValues = append(s.sValues, []byte(n))
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s.itemTypes = append(s.itemTypes, StorageStreamItem)
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case *shortNode:
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if trace {
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fmt.Printf("shortNode %x\n", hex)
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}
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hexVal := concat(hex, n.Key...)
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toStream(n.Val, hexVal, accounts, rs, hr, false, s, trace)
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case *duoNode:
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if trace {
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fmt.Printf("duoNode %x\n", hex)
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}
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hashOnly := rs.HashOnly(hex) // Save this because rs can move on to other keys during the recursive invocation
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if hashOnly {
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var hn common.Hash
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if _, err := hr.hash(n, force, hn[:]); err != nil {
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panic(fmt.Sprintf("could not hash duoNode: %v", err))
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}
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s.hexes = append(s.hexes, hex)
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s.hashes = append(s.hashes, hn)
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if accounts {
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s.itemTypes = append(s.itemTypes, AHashStreamItem)
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} else {
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s.itemTypes = append(s.itemTypes, SHashStreamItem)
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}
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} else {
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i1, i2 := n.childrenIdx()
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hex1 := make([]byte, len(hex)+1)
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copy(hex1, hex)
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hex1[len(hex)] = i1
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hex2 := make([]byte, len(hex)+1)
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copy(hex2, hex)
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hex2[len(hex)] = i2
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toStream(n.child1, hex1, accounts, rs, hr, false, s, trace)
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toStream(n.child2, hex2, accounts, rs, hr, false, s, trace)
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}
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case *fullNode:
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if trace {
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fmt.Printf("fullNode %x\n", hex)
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}
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hashOnly := rs.HashOnly(hex) // Save this because rs can move on to other keys during the recursive invocation
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if hashOnly {
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var hn common.Hash
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if _, err := hr.hash(n, force, hn[:]); err != nil {
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panic(fmt.Sprintf("could not hash duoNode: %v", err))
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}
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s.hexes = append(s.hexes, hex)
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s.hashes = append(s.hashes, hn)
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if accounts {
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s.itemTypes = append(s.itemTypes, AHashStreamItem)
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} else {
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s.itemTypes = append(s.itemTypes, SHashStreamItem)
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}
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} else {
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for i, child := range n.Children {
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if child != nil {
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toStream(child, concat(hex, byte(i)), accounts, rs, hr, false, s, trace)
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}
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}
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}
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case *accountNode:
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if trace {
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fmt.Printf("accountNode %x\n", hex)
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}
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s.hexes = append(s.hexes, hex)
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s.aValues = append(s.aValues, &n.Account)
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s.itemTypes = append(s.itemTypes, AccountStreamItem)
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hashOnly := rs.HashOnly(hex)
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if !n.IsEmptyRoot() && !hashOnly {
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if n.storage != nil {
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toStream(n.storage, hex, false /*accounts*/, rs, hr, true /*force*/, s, trace)
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}
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}
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case hashNode:
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if trace {
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fmt.Printf("hashNode %x\n", hex)
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}
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hashOnly := rs.HashOnly(hex)
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if !hashOnly {
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if c := rs.Current(); len(c) == len(hex)+1 && c[len(c)-1] == 16 {
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hashOnly = true
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}
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}
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if hashOnly {
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var hn common.Hash
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copy(hn[:], []byte(n))
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s.hexes = append(s.hexes, hex)
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s.hashes = append(s.hashes, hn)
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if accounts {
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s.itemTypes = append(s.itemTypes, AHashStreamItem)
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} else {
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s.itemTypes = append(s.itemTypes, SHashStreamItem)
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}
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} else {
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panic(fmt.Errorf("unexpected hashNode: %s, at hex: %x (%d)", n, hex, len(hex)))
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}
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default:
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panic(fmt.Errorf("unexpected node: %T", nd))
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}
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}
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// StreamHash computes the hash of a stream, as if it was a trie
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func StreamHash(s *Stream, storagePrefixLen int, trace bool) (common.Hash, error) {
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hb := NewHashBuilder(trace)
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var succ bytes.Buffer
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var curr OneBytesTape
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var succStorage bytes.Buffer
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var currStorage OneBytesTape
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var value OneBytesTape
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var hashes TwoHashTape
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var groups, sGroups []uint16 // Separate groups slices for storage items and for accounts
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var a accounts.Account
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var fieldSet uint32
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var ki, ai, si, hi int
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var itemType, sItemType StreamItem
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hb.SetKeyTape(&curr)
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hb.SetValueTape(NewRlpSerializableBytesTape(&value))
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hb.SetNonceTape((*OneUint64Tape)(&a.Nonce))
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hb.SetBalanceTape((*OneBalanceTape)(&a.Balance))
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hb.SetHashTape(&hashes)
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hb.SetSSizeTape((*OneUint64Tape)(&a.StorageSize))
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hb.Reset()
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curr.Reset()
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currStorage.Reset()
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hashOnly := func(_ []byte) bool { return !trace }
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for ki < len(s.hexes) {
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hex := s.hexes[ki]
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newItemType := s.itemTypes[ki]
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if newItemType == AccountStreamItem || newItemType == AHashStreamItem {
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// If there was an open storage "sub-stream", close it and set the storage flag on
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if succStorage.Len() > 0 {
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currStorage.Reset()
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currStorage.Write(succStorage.Bytes())
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succStorage.Reset()
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if currStorage.Len() > 0 {
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hb.SetKeyTape(&currStorage)
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var err error
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sGroups, err = GenStructStep(AccountFieldSetNotAccount, hashOnly, sItemType == SHashStreamItem, false, currStorage.Bytes(), succStorage.Bytes(), hb, sGroups)
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if err != nil {
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return common.Hash{}, err
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}
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currStorage.Reset()
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fieldSet += AccountFieldRootOnly
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}
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} else if itemType == AccountStreamItem && !a.IsEmptyRoot() {
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// Push the account root on the stack instead
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hashes.hashes[0] = a.Root
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hashes.idx = 0
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if err := hb.hash(1); err != nil {
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return common.Hash{}, err
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}
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fieldSet += AccountFieldRootOnly
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}
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curr.Reset()
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curr.Write(succ.Bytes())
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succ.Reset()
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succ.Write(hex)
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if curr.Len() > 0 {
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hb.SetKeyTape(&curr)
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var err error
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groups, err = GenStructStep(fieldSet, hashOnly, itemType == AHashStreamItem, false, curr.Bytes(), succ.Bytes(), hb, groups)
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if err != nil {
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return common.Hash{}, err
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}
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}
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itemType = newItemType
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switch itemType {
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case AccountStreamItem:
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if s.aValues[ai] == nil {
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return common.Hash{}, fmt.Errorf("s.aValues[%d] == nil", ai)
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}
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a.Copy(s.aValues[ai])
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ai++
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fieldSet = AccountFieldSetNotContract // base level - nonce and balance
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if a.HasStorageSize {
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fieldSet += AccountFieldSSizeOnly
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}
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if !a.IsEmptyCodeHash() {
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fieldSet += AccountFieldCodeHashOnly
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// Load hashes onto the stack of the hashbuilder
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hashes.hashes[0] = a.CodeHash // this will be just beneath the top of the stack
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hashes.idx = 0 // Reset the counter
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if err := hb.hash(1); err != nil {
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return common.Hash{}, err
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}
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}
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case AHashStreamItem:
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h := s.hashes[hi]
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hi++
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hashes.hashes[0] = h
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hashes.idx = 0
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}
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} else {
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currStorage.Reset()
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currStorage.Write(succStorage.Bytes())
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succStorage.Reset()
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succStorage.Write(hex[2*storagePrefixLen+1:])
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if currStorage.Len() > 0 {
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hb.SetKeyTape(&currStorage)
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var err error
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sGroups, err = GenStructStep(AccountFieldSetNotAccount, hashOnly, sItemType == SHashStreamItem, false, currStorage.Bytes(), succStorage.Bytes(), hb, sGroups)
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if err != nil {
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return common.Hash{}, err
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}
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}
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sItemType = newItemType
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switch sItemType {
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case StorageStreamItem:
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v := s.sValues[si]
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si++
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value.Buffer.Reset()
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value.Buffer.Write(v)
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case SHashStreamItem:
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h := s.hashes[hi]
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hi++
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hashes.hashes[0] = h
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hashes.idx = 0
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}
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}
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ki++
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}
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// If there was an open storage "sub-stream", close it and set the storage flag on
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if succStorage.Len() > 0 {
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currStorage.Reset()
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currStorage.Write(succStorage.Bytes())
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succStorage.Reset()
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if currStorage.Len() > 0 {
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hb.SetKeyTape(&currStorage)
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var err error
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_, err = GenStructStep(AccountFieldSetNotAccount, hashOnly, sItemType == SHashStreamItem, false, currStorage.Bytes(), succStorage.Bytes(), hb, sGroups)
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if err != nil {
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return common.Hash{}, err
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}
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currStorage.Reset()
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fieldSet += AccountFieldRootOnly
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}
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} else if itemType == AccountStreamItem && !a.IsEmptyRoot() {
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// Push the account root on the stack instead
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hashes.hashes[0] = a.Root
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hashes.idx = 0
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if err := hb.hash(1); err != nil {
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return common.Hash{}, err
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}
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fieldSet += AccountFieldRootOnly
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}
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curr.Reset()
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curr.Write(succ.Bytes())
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succ.Reset()
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if curr.Len() > 0 {
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hb.SetKeyTape(&curr)
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var err error
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_, err = GenStructStep(fieldSet, hashOnly, itemType == AHashStreamItem, false, curr.Bytes(), succ.Bytes(), hb, groups)
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if err != nil {
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return common.Hash{}, err
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}
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}
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if trace {
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filename := "root.txt"
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f, err1 := os.Create(filename)
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if err1 == nil {
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defer f.Close()
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hb.root().print(f)
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}
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}
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return hb.rootHash(), nil
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}
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// HashWithModifications computes the hash of the would-be modified trie, but without any modifications
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func HashWithModifications(
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t *Trie,
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aKeys common.Hashes, aValues []*accounts.Account,
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sKeys common.StorageKeys, sValues [][]byte,
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storagePrefixLen int,
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trace bool,
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) (common.Hash, error) {
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hr := newHasher(false)
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defer returnHasherToPool(hr)
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keyCount := len(aKeys) + len(sKeys)
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var stream = Stream{
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hexes: make([][]byte, keyCount),
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itemTypes: make([]StreamItem, keyCount),
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aValues: aValues,
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sValues: sValues,
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}
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var accountKeyHex []byte
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var storageKeyHex []byte
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var ki, ai, si int
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// Convert all account keys and storage keys to HEX encoding and merge them into one sorted list
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// when we merge, the keys are never equal
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for ki < keyCount {
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if accountKeyHex == nil && ai < len(aKeys) {
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accountKeyHex = keybytesToHex(aKeys[ai][:])
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ai++
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}
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if storageKeyHex == nil && si < len(sKeys) {
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storageKeyHex = concat(keybytesToHex(sKeys[si][:storagePrefixLen]), keybytesToHex(sKeys[si][storagePrefixLen:])...)
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si++
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}
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if accountKeyHex == nil {
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stream.hexes[ki] = storageKeyHex
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stream.itemTypes[ki] = StorageStreamItem
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storageKeyHex = nil // consumed
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ki++
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} else if storageKeyHex == nil {
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stream.hexes[ki] = accountKeyHex
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stream.itemTypes[ki] = AccountStreamItem
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accountKeyHex = nil // consumed
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ki++
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} else if bytes.Compare(accountKeyHex, storageKeyHex) < 0 {
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stream.hexes[ki] = accountKeyHex
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stream.itemTypes[ki] = AccountStreamItem
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accountKeyHex = nil // consumed
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ki++
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} else {
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stream.hexes[ki] = storageKeyHex
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stream.itemTypes[ki] = StorageStreamItem
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storageKeyHex = nil // consumed
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ki++
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}
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}
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if trace {
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fmt.Printf("len(stream.hexes)=%d\n", len(stream.hexes))
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for _, hex := range stream.hexes {
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fmt.Printf("%x\n", hex)
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}
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}
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rs := &ResolveSet{minLength: 0, hexes: sortable(stream.hexes), inited: true, lteIndex: 0}
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oldStream := ToStream(t, rs, false)
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if trace {
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fmt.Printf("len(oldStream.hexes)=%d\n", len(oldStream.hexes))
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for _, hex := range oldStream.hexes {
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fmt.Printf("%x\n", hex)
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}
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}
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// Now we merge old and new streams, preferring the new
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var oldKi, oldAi, oldSi, oldHi int
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ki = 0
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ai = 0
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si = 0
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var oldHex, hex []byte
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var oldItemType, itemType StreamItem
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var newStream Stream
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oldKeyCount := len(oldStream.hexes)
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for hex != nil || oldHex != nil || oldKi < oldKeyCount || ki < keyCount {
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if oldHex == nil && oldKi < oldKeyCount {
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oldHex = oldStream.hexes[oldKi]
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oldItemType = oldStream.itemTypes[oldKi]
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oldKi++
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}
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if hex == nil && ki < keyCount {
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hex = stream.hexes[ki]
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itemType = stream.itemTypes[ki]
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ki++
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}
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if oldHex == nil {
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switch itemType {
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case AccountStreamItem:
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if stream.aValues[ai] != nil {
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newStream.hexes = append(newStream.hexes, hex)
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newStream.aValues = append(newStream.aValues, stream.aValues[ai])
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newStream.itemTypes = append(newStream.itemTypes, AccountStreamItem)
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}
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ai++
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case StorageStreamItem:
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if len(stream.sValues[si]) > 0 {
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newStream.hexes = append(newStream.hexes, hex)
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newStream.sValues = append(newStream.sValues, stream.sValues[si])
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newStream.itemTypes = append(newStream.itemTypes, StorageStreamItem)
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}
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si++
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default:
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return common.Hash{}, fmt.Errorf("unexpected stream item type (oldHex == nil): %d", itemType)
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}
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hex = nil // consumed
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} else if hex == nil {
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newStream.hexes = append(newStream.hexes, oldHex)
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switch oldItemType {
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case AccountStreamItem:
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newStream.aValues = append(newStream.aValues, oldStream.aValues[oldAi])
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oldAi++
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newStream.itemTypes = append(newStream.itemTypes, AccountStreamItem)
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case StorageStreamItem:
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newStream.sValues = append(newStream.sValues, oldStream.sValues[oldSi])
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oldSi++
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newStream.itemTypes = append(newStream.itemTypes, StorageStreamItem)
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case AHashStreamItem:
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newStream.hashes = append(newStream.hashes, oldStream.hashes[oldHi])
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oldHi++
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newStream.itemTypes = append(newStream.itemTypes, AHashStreamItem)
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case SHashStreamItem:
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newStream.hashes = append(newStream.hashes, oldStream.hashes[oldHi])
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oldHi++
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newStream.itemTypes = append(newStream.itemTypes, SHashStreamItem)
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}
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oldHex = nil // consumed
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} else {
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// Special case - account gets deleted
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if itemType == AccountStreamItem && stream.aValues[ai] == nil && bytes.HasPrefix(oldHex, hex) {
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switch oldItemType {
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case AccountStreamItem:
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oldAi++
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case StorageStreamItem:
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oldSi++
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case AHashStreamItem, SHashStreamItem:
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oldHi++
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}
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oldHex = nil
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} else {
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switch bytes.Compare(oldHex, hex) {
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case -1:
|
|
newStream.hexes = append(newStream.hexes, oldHex)
|
|
switch oldItemType {
|
|
case AccountStreamItem:
|
|
newStream.aValues = append(newStream.aValues, oldStream.aValues[oldAi])
|
|
oldAi++
|
|
newStream.itemTypes = append(newStream.itemTypes, AccountStreamItem)
|
|
case StorageStreamItem:
|
|
newStream.sValues = append(newStream.sValues, oldStream.sValues[oldSi])
|
|
oldSi++
|
|
newStream.itemTypes = append(newStream.itemTypes, StorageStreamItem)
|
|
case AHashStreamItem:
|
|
newStream.hashes = append(newStream.hashes, oldStream.hashes[oldHi])
|
|
oldHi++
|
|
newStream.itemTypes = append(newStream.itemTypes, AHashStreamItem)
|
|
case SHashStreamItem:
|
|
newStream.hashes = append(newStream.hashes, oldStream.hashes[oldHi])
|
|
oldHi++
|
|
newStream.itemTypes = append(newStream.itemTypes, SHashStreamItem)
|
|
}
|
|
oldHex = nil // consumed
|
|
case 1:
|
|
switch itemType {
|
|
case AccountStreamItem:
|
|
if stream.aValues[ai] != nil {
|
|
newStream.hexes = append(newStream.hexes, hex)
|
|
newStream.aValues = append(newStream.aValues, stream.aValues[ai])
|
|
newStream.itemTypes = append(newStream.itemTypes, AccountStreamItem)
|
|
}
|
|
ai++
|
|
case StorageStreamItem:
|
|
if len(stream.sValues[si]) > 0 {
|
|
newStream.hexes = append(newStream.hexes, hex)
|
|
newStream.sValues = append(newStream.sValues, stream.sValues[si])
|
|
newStream.itemTypes = append(newStream.itemTypes, StorageStreamItem)
|
|
}
|
|
si++
|
|
default:
|
|
return common.Hash{}, fmt.Errorf("unexpected stream item type (oldHex > hex): %d", itemType)
|
|
}
|
|
hex = nil // consumed
|
|
case 0:
|
|
switch itemType {
|
|
case AccountStreamItem:
|
|
if stream.aValues[ai] != nil {
|
|
newStream.hexes = append(newStream.hexes, hex)
|
|
newStream.aValues = append(newStream.aValues, stream.aValues[ai])
|
|
newStream.itemTypes = append(newStream.itemTypes, AccountStreamItem)
|
|
}
|
|
ai++
|
|
oldAi++ // Discard old values
|
|
case StorageStreamItem:
|
|
if len(stream.sValues[si]) > 0 {
|
|
newStream.hexes = append(newStream.hexes, hex)
|
|
newStream.sValues = append(newStream.sValues, stream.sValues[si])
|
|
newStream.itemTypes = append(newStream.itemTypes, StorageStreamItem)
|
|
}
|
|
si++
|
|
oldSi++ // Discard old values
|
|
default:
|
|
return common.Hash{}, fmt.Errorf("unexpected stream item type (oldHex == hex): %d", itemType)
|
|
}
|
|
hex = nil // consumed
|
|
oldHex = nil // consumed
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if trace {
|
|
fmt.Printf("len(newStream.hexes)=%d\n", len(newStream.hexes))
|
|
for _, hex := range newStream.hexes {
|
|
fmt.Printf("%x\n", hex)
|
|
}
|
|
}
|
|
return StreamHash(&newStream, storagePrefixLen, trace)
|
|
}
|